Preparation of a selection of control variables for a dose distribution to be regulated in a technical appliance

摘要

The invention relates to a planning tool for the interactive selection of control variables (x₁, y₇, alpha₁, alpha₂, alpha₃, I₁, I₂) of a radiation therapy plan from a database ( 1 ) comprising a plurality of pre-calculated solutions. Each solution represents a radiation therapy plan which, from a technical point of view, consists of a plurality of control variables or instructions. Each solution also has characteristic values for radiation doses for a target volume (T, Target) and at least one risk volume (risk organ, h₁, h₂, h₃) which are stored in the database ( 1 ). A plurality of axes are visibly represented on a display device ( 3; 3 a , 3 b) as radiation dose scales ( 30, 31, 32, 33 ) for the target volume (T) and the at least one risk volume (h₁, h₂, h₃), for the formation of at least one risk axis and one target axis. The characteristic values ( 50, 51, 52, 53 ) of the radiation doses for at least a plurality of the stored solutions are allocated to the respective corresponding axes in such a way that an acceptance interval (a₃₀, a₃₁, a₃₂, a₃₃) is created for each risk axis ( 31, 32, 33 ) and the target axis ( 30 ), said acceptance interval determining a common planning area ( 40; 41, 42 ) for all axes. Said planning area ( 40 ) is visibly emphasised on the display device ( 3 ) in relation to the surrounding field ( 45, 45 a).